Leakage-proof tightening mechanism of injection mold

Abstract

The utility model discloses a leak-proof tightening mechanism of an injection mold, which comprises a base, support rods are fixedly mounted at four corners of the top wall of the base, a same top plate is fixedly mounted at the top ends of the plurality of support rods, a tightening component is mounted on the top wall of the top plate, and an abutting component is mounted on the outer side wall of the base. According to the anti-leakage tightening mechanism of the injection mold, under the mutual cooperation work of all parts in the abutting assembly and the tightening assembly, an injection molding cavity can be formed after the movable mold and the fixed mold are closed, and after a sealing ring and a sealing groove are arranged, the overall sealing performance after mold closing is improved, and the situation of material leakage during injection molding is prevented; and after mold closing is completed, the stress base is fixed in an abutting mode through mutual cooperation of the abutting base and the anti-skid pad, the tightness after mold closing is enhanced, the sealing state after mold closing of the movable mold and the fixed mold is improved, and the hidden danger that burrs and the like affect product forming is prevented.

Description

Technical Field

[0001] This utility model relates to the field of mold sealing technology, specifically a leak-proof and tight-fitting mechanism for injection molds. Background Technology

[0002] Injection molds are tools used for molding plastics. They inject molten plastic into a cavity of a specific shape, and after cooling and solidification, form plastic products with the required shape and size. Injection molds are widely used in many industries such as electronics, automobiles, home appliances, and daily necessities, and are key process equipment for realizing the large-scale production of plastic products.

[0003] Patent CN221365634U discloses a leak-proof injection mold, relating to the field of injection mold technology. The mold includes a nozzle with a forming mechanism on its back. The forming mechanism includes a fixed mold and a movable mold on its back. A conical channel is formed through the front of the fixed mold, and a movable block is located inside the conical channel. A limiting plate is arranged around the back of the fixed mold near its perimeter. A limiting groove is formed on the front of the movable mold corresponding to the limiting plate. A forming groove is formed on the back of the movable mold inside the limiting groove. A condensation groove is formed inside the movable mold near the forming groove. The movable block design can block the thermoplastic during product demolding, preventing it from leaking through the conical channel and damaging the product. This greatly reduces material waste and effectively improves production efficiency.

[0004] The above-mentioned device has certain shortcomings in use: after the moving mold and the fixed mold are closed, because the edge of the mold cavity is not sealed, hot melt plastic will overflow outward through the edge of the cavity during injection molding. After the plastic product inside is molded, there will be some burrs, which need to be cleaned manually.

[0005] Therefore, this utility model provides a leak-proof sealing mechanism for injection molds to solve the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a leak-proof sealing mechanism for injection molds, which solves the aforementioned problems.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a leak-proof and tight-fitting mechanism for injection molds, including a base, support rods fixedly installed at the four corners of the top wall of the base, a top plate fixedly installed at the top of several support rods, a tight-fitting component installed on the top wall of the top plate, and abutment components installed on the outer walls of the base.

[0008] The fastening assembly includes a hydraulic rod, which is fixedly installed at the center of the top wall of the top plate. The movable end of the hydraulic rod slides through the top plate and is fixedly installed with a lifting seat. Corresponding support rods slide through the four corners of the top wall of the lifting seat. A moving mold is installed on the bottom wall of the lifting seat. A limit seat is fixedly installed on the top of the outer wall of the moving mold. A sealing ring is fixedly installed on the bottom wall of the limit seat. A positioning groove is opened on the top of the inner wall of the base. A fixed mold is installed on the inner wall of the base. A positioning seat is fixedly installed on the top of the outer wall of the fixed mold. A sealing groove is opened on the top wall of the fixed mold. The inner wall of the sealing groove fits with the outer wall of the sealing ring. Several fastening bolts are evenly screwed onto the top wall of the positioning seat. The bottom ends of the fastening bolts are screwed through the positioning seat and screwed into the inner wall of the positioning groove for fixation.

[0009] Through the above technical solution, the setting of the tight-fitting component can improve the stable sealing performance after the moving mold and the fixed mold are closed, prevent material leakage and burrs on the injection molded product, and facilitate the replacement of the fixed mold.

[0010] Furthermore, the fixed mold position matches the moving mold, and grooves are opened on the inner sidewalls of the positioning groove. The outer wall of the positioning seat fits into the inner wall of the positioning groove, and lifting seats are fixedly installed on the outer wall of the positioning seat and at the corresponding groove position. The outer walls of the two lifting seats are located in the inner wall of the corresponding groove.

[0011] By using the above technical solution, the fixed mold can be removed from the base by lifting the seat away from the inner wall of the groove.

[0012] Furthermore, the abutment component includes a U-shaped seat, which is fixedly connected to the outer wall of the base. A rotating shaft is fixedly installed on the inner wall of the U-shaped seat, and a steering platform is rotatably installed on the outer wall of the rotating shaft. A receiving groove is provided on the bottom wall of the steering platform.

[0013] Through the above technical solution, the steering table rotates along the outer wall of the shaft, thereby driving the movement of the abutment seat.

[0014] Furthermore, an abutment push rod is hinged to the outer wall of the base and located at the bottom of the U-shaped seat, with the movable end of the abutment push rod hinged to the inner wall of the receiving groove.

[0015] Through the above technical solution, the contraction of the movable end of the push rod drives the steering table and the abutment seat to rotate, and the force-bearing seat abuts and receives the force.

[0016] Furthermore, a stop seat is fixedly installed at the top of the steering platform. The side wall of the stop seat has rounded corners, and several anti-slip pads are evenly distributed on the bottom wall of the stop seat.

[0017] Through the above technical solution, the anti-slip mat can increase the contact friction between itself and the bearing seat, thereby improving the stability after contact.

[0018] Furthermore, force-bearing seats are fixedly installed on both the left and right sides of the top wall of the lifting seat. The top walls of the two force-bearing seats are provided with force-bearing grooves, and the positions of the two force-bearing seats match the positions of the corresponding abutment seats and anti-slip pads.

[0019] The above technical solution, with the cooperation of the force-bearing seat and the force-bearing groove, is mainly used to support the abutment seat.

[0020] Furthermore, an injection tube is installed inside the moving mold, and the top of the injection tube passes through the lifting seat and extends to the outside through a leak-proof rubber sleeve.

[0021] The injection tube, as described above, is primarily used to allow liquid plastic to enter the cavity of the mold.

[0022] Beneficial effects

[0023] This invention provides a leak-proof sealing mechanism for injection molds. Compared with the prior art, it has the following advantages:

[0024] (1) The anti-leakage and tight-fitting mechanism of the injection mold, through the cooperation of the various parts in the abutment component and the tight-fitting component, forms an injection cavity after the moving mold and the fixed mold are closed. After setting the sealing ring and sealing groove, the overall sealing performance after mold closing is improved, preventing material leakage during injection. After the mold is closed, the abutment seat and the anti-slip pad cooperate to abut and fix the force seat, strengthen the tightness after mold closing, improve the sealing state after the moving mold and the fixed mold are closed, and prevent the occurrence of burrs and other hidden dangers that affect product molding. Attached Figure Description

[0025] Figure 1 This is a front view of the overall structure of this utility model;

[0026] Figure 2 This is a right view of the external structure of this utility model;

[0027] Figure 3 This is a bottom view of the external structure of the moving mold of this utility model;

[0028] Figure 4 This is an exploded view of the internal structure of the fastening component of this utility model;

[0029] Figure 5 This is an exploded view of the internal structure of the contact component of this utility model;

[0030] Figure 6 This is an exploded bottom view of the internal structure of the contact component of this utility model.

[0031] In the diagram: 1. Base; 2. Abutment assembly; 21. U-shaped seat; 22. Turning platform; 23. Abutment seat; 24. Anti-slip pad; 25. Rounded corner; 26. Receiving groove; 27. Abutment push rod; 28. Rotating shaft; 29. ​​Force-bearing seat; 210. Force-bearing groove; 3. Support rod; 4. Top plate; 5. Fastening assembly; 51. Hydraulic rod; 52. Lifting seat; 53. Moving mold; 54. Limiting seat; 55. Sealing ring; 56. Lifting seat; 57. Positioning groove; 58. Groove; 59. Fixed mold; 510. Positioning seat; 511. Sealing groove; 512. Fastening bolt; 6. Injection tube. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1:

[0034] Please see Figures 1-6 A leak-proof and tight-fitting mechanism for an injection mold includes a base 1, with support rods 3 fixedly installed at the four corners of the top wall of the base 1, and the same top plate 4 fixedly installed at the top of several support rods 3. A tight-fitting component 5 is installed on the top wall of the top plate 4, and abutting components 2 are installed on the outer side wall of the base 1.

[0035] The fastening assembly 5 includes a hydraulic rod 51, which is fixedly installed at the center of the top wall of the top plate 4. The movable end of the hydraulic rod 51 slides through the top plate 4 and is fixedly installed with a lifting seat 52. The four corners of the top wall of the lifting seat 52 slide through corresponding support rods 3. A moving mold 53 is installed on the bottom wall of the lifting seat 52. A limit seat 54 is fixedly installed on the top of the outer wall of the moving mold 53. A sealing ring 55 is fixedly installed on the bottom wall of the limit seat 54. A positioning groove 57 is opened on the top of the inner wall of the base 1. A fixed mold 59 is installed on the inner wall of the base 1. A positioning seat 510 is fixedly installed on the top of the outer wall of the fixed mold 59. A positioning groove 57 is opened on the top of the top wall of the fixed mold 59. The sealing groove 511 has its inner wall fitting against the outer wall of the sealing ring 55. Several fastening bolts 512 are evenly screwed onto the top wall of the positioning seat 510. The bottom ends of the fastening bolts 512 are screwed through the positioning seat 510 and screwed into the inner wall of the positioning groove 57. The position of the fixed mold 59 matches that of the moving mold 53. Grooves 58 are opened on the inner side wall of the positioning groove 57. The outer wall of the positioning seat 510 fits against the inner wall of the positioning groove 57. Lifting seats 56 are fixedly installed on the outer side wall of the positioning seat 510 at the position corresponding to the groove 58. The outer walls of the two lifting seats 56 are located in the inner wall of the corresponding groove 58.

[0036] In this embodiment of the utility model, the purpose of this arrangement is that, during operation, the hydraulic rod 51 pushes the lifting seat 52 and the moving mold 53 down into the inner wall of the fixed mold 59 inside the base 1 to close the mold. At the same time, the sealing groove 511 and the sealing ring 55 work together to improve the sealing performance after mold closing, preventing liquid plastic from overflowing from the injection cavity. The movable end of the hydraulic rod 51 always remains in an extended state to resist the lifting seat 52 and improve the tightness after mold closing. Furthermore, when the fixed mold 59 needs to be replaced, the disassembly work can be completed quickly.

[0037] Example 2:

[0038] Please see Figures 1-6 This embodiment provides a technical solution based on Embodiment 1: the abutment component 2 includes a U-shaped seat 21, which is fixedly connected to the outer wall of the base 1. A rotating shaft 28 is fixedly installed on the inner wall of the U-shaped seat 21, and a steering platform 22 is rotatably installed on the outer wall of the rotating shaft 28. A receiving groove 26 is provided on the bottom wall of the steering platform 22. An abutment push rod 27 is hingedly installed on the outer wall of the base 1 at the bottom of the U-shaped seat 21. The movable end of the abutment push rod 27 is hingedly installed to the inner wall of the receiving groove 26. The steering platform 22... A top-mounted abutment seat 23 is fixedly installed. The side wall of the abutment seat 23 has rounded corners 25. The bottom wall of the abutment seat 23 is evenly provided with several anti-slip pads 24. The left and right sides of the top wall of the lifting seat 52 are fixedly installed with force-bearing seats 29. The top walls of the two force-bearing seats 29 are provided with force-bearing grooves 210. The positions of the two force-bearing seats 29 are matched with the positions of the corresponding abutment seats 23 and anti-slip pads 24. An injection tube 6 is installed inside the moving mold 53. The top of the injection tube 6 passes through the lifting seat 52 through a leak-proof rubber sleeve and extends to the outside.

[0039] In this embodiment of the utility model, the purpose of this arrangement is that, when the abutting component 2 is in operation, the movable end of the abutting push rod 27 extends to push the steering table 22 and the abutting seat 23 to rotate, and abuts and fixes the force-bearing seat 29 and the force-bearing groove 210 on the top wall of the lifting seat 52. The abutting seat 23 has rounded corners 25 on its side wall to facilitate the rotation of the abutting seat 23 into the force-bearing groove 210, which limits the abutting on the left and right sides of the lifting seat 52, and can also further improve the overall tightness after the mold is closed.

[0040] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0041] During operation, the external power supply and controller are electrically connected to the push rod 27 and hydraulic rod 51. During product injection molding, the hydraulic rod 51 pushes the lifting seat 52 down along the outer wall of the support rod 3. As the lifting seat 52 descends, it simultaneously drives the force seat 29, moving mold 53, limit seat 54, and sealing ring 55 down until the moving mold 53 descends into the inner wall of the fixed mold 59 installed inside the base 1, completing the mold closing of the fixed mold 59 and the moving mold 53. At the same time, the sealing ring 55 enters the inner wall of the corresponding sealing groove 511 to seal the fixed mold 59 and the moving mold 53 after mold closing. After the moving mold 53 and the fixed mold 59 are tightly closed by the limit seat 54, an injection cavity is formed inside the moving mold 53 and the fixed mold 59. Then, the movable end of the push rod 27 pushes the steering table 22 to rotate on the outer wall of the rotating shaft 28 in the inner wall of the U-shaped seat 21. The steering table 22 simultaneously drives the abutment seat 23 and the anti-slip pad 24 to rotate. At the corresponding force-bearing seat 29, the abutment seat 23 drives the anti-slip pad 24 to engage and fix with the force-bearing groove 210. After the force-bearing seat 29 is engaged and receives force, it drives the lifting seat 52 and the moving mold 53 to press down, making the fixed mold 59 and the moving mold 53 more tightly closed. The external injection molding machine is connected to the injection tube 6 through the feed pipe and delivers liquid plastic into the cavity formed by the fixed mold 59 and the moving mold 53. The plastic inside the cavity cools and solidifies. With the cooperation of the fastening component 5 and the abutment component 2, the mold is more tightly closed after the mold is closed, preventing material leakage and molding burrs. When the fixed mold 59 needs to be replaced, the fastening bolt 512 is removed, and the lifting seat 56 is disengaged from the inner wall by entering the groove 58, which in turn drives the positioning seat 510 to disengage from the inner wall of the positioning groove 57. Finally, the fixed mold 59 is disengaged from the interior of the base 1, thus completing the removal and replacement of the fixed mold 59.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing mechanism for an injection mold, characterized in that: Includes a base (1), with support rods (3) fixedly installed at the four corners of the top wall of the base (1), and the same top plate (4) fixedly installed at the top of several support rods (3), with a fastening component (5) installed on the top wall of the top plate (4), and abutment components (2) installed on the outer side wall of the base (1); The fastening assembly (5) includes a hydraulic rod (51), which is fixedly installed at the center of the top wall of the top plate (4). The movable end of the hydraulic rod (51) slides through the top plate (4) and is fixedly installed with a lifting seat (52). The four corners of the top wall of the lifting seat (52) slide through corresponding support rods (3). A moving mold (53) is installed on the bottom wall of the lifting seat (52). A limit seat (54) is fixedly installed on the top of the outer wall of the moving mold (53). A sealing ring (55) is fixedly installed on the bottom wall of the limit seat (54). The base (1) The inner wall of the base (1) has a positioning groove (57) at the top. The base (1) has a fixed mold (59) installed on its inner wall. The fixed mold (59) has a positioning seat (510) fixedly installed on its outer wall. The fixed mold (59) has a sealing groove (511) on its top wall. The inner wall of the sealing groove (511) is in contact with the outer wall of the sealing ring (55). The top wall of the positioning seat (510) is evenly screwed with several fastening bolts (512). The bottom ends of the fastening bolts (512) are screwed through the positioning seat (510) and screwed to the inner wall of the positioning groove (57) for fixation.

2. The leak-proof sealing mechanism for injection molds according to claim 1, characterized in that: The fixed mold (59) is positioned to match the moving mold (53). The inner sidewall of the positioning groove (57) is provided with grooves (58). The outer wall of the positioning seat (510) is in contact with the inner wall of the positioning groove (57). The outer wall of the positioning seat (510) and the position corresponding to the groove (58) are fixedly installed with lifting seats (56). The outer walls of the two lifting seats (56) are located in the inner wall of the corresponding groove (58).

3. The leak-proof sealing mechanism for injection molds according to claim 1, characterized in that: The abutment component (2) includes a U-shaped seat (21), which is fixedly connected to the outer wall of the base (1). A rotating shaft (28) is fixedly installed on the inner wall of the U-shaped seat (21), and a steering platform (22) is rotatably installed on the outer wall of the rotating shaft (28). A receiving groove (26) is provided on the bottom wall of the steering platform (22).

4. The leak-proof sealing mechanism for injection molds according to claim 1, characterized in that: An abutment push rod (27) is hinged to the outer wall of the base (1) and located at the bottom of the U-shaped seat (21). The movable end of the abutment push rod (27) is hinged to the inner wall of the receiving groove (26).

5. The leak-proof sealing mechanism for injection molds according to claim 3, characterized in that: The top of the steering platform (22) is fixedly installed with an abutment seat (23), the side wall of the abutment seat (23) is provided with rounded corners (25), and the bottom wall of the abutment seat (23) is provided with a number of anti-slip pads (24).

6. The leak-proof sealing mechanism for injection molds according to claim 1, characterized in that: The lifting seat (52) has a force-bearing seat (29) fixedly installed on both sides of the top wall. The top walls of the two force-bearing seats (29) are provided with force-bearing grooves (210). The positions of the two force-bearing seats (29) match the positions of the corresponding abutment seats (23) and anti-slip pads (24).

7. The leak-proof sealing mechanism for injection molds according to claim 1, characterized in that: An injection tube (6) is installed inside the moving mold (53). The top end of the injection tube (6) passes through the lifting seat (52) through a leak-proof rubber sleeve and extends to the outside.

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